WO2022051957A1

WO2022051957A1 - Display device, touch panel and manufacturing method therefor

Info

Publication number: WO2022051957A1
Application number: PCT/CN2020/114310
Authority: WO
Inventors: 刘纯建; 田�健; 吴信涛; 雷杰; 王杰; 许邹明; 刘天晴
Original assignee: 京东方科技集团股份有限公司; 合肥鑫晟光电科技有限公司
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2022-03-17
Also published as: CN114585995B; US11740743B2; US20220308697A1; CN114585995A; US20230341979A1

Abstract

A display device, a touch panel and a manufacturing method therefor, relating to the technical field of touch. The touch panel comprises a substrate (1) and a touch layer (2). The touch layer (2) is arranged on one side of the substrate (1) and provided with a first touch area (21) and an edge area (22) surrounding the first touch area (21); the edge area (22) comprises at least one second touch area (221), and the second touch area (221) comprises a plurality of key parts (2211); the plurality of key parts (2211) at least comprise a mutual capacitance key part (2211a) which comprises, arranged in the same layer, a first touch electrode (210), a second touch electrode (220) and virtual electrodes (230); a gap is provided between the first touch electrode (210) and the second touch electrode (220), and the virtual electrodes (230) are arranged in the gap between the first touch electrode (210) and the second touch electrode (220) at intervals.

Description

Display device, touch panel and manufacturing method thereof

technical field

The present disclosure relates to the field of touch technology, and in particular, to a display device, a touch panel and a manufacturing method thereof.

Background technique

At present, in a display device with touch function, in addition to the touch operation in the display area, a plurality of touch buttons can also be set in the edge area other than the display area, especially in the display of the vehicle central control system. In devices, touch buttons have been widely used to replace physical buttons. However, the area where the touch keys are located and the display area have great differences in the reflection and refraction effects of light, which makes the optical uniformity of the display device poor and affects the display effect.

It should be noted that the information disclosed in the above Background section is only for enhancement of understanding of the background of the present disclosure, and therefore may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

An object of the present disclosure is to provide a display device, a touch panel, and a manufacturing method of the touch panel.

According to an aspect of the present disclosure, there is provided a touch panel, comprising:

substrate;

The touch layer is disposed on one side of the substrate and has a first touch area and an edge area surrounding the first touch area; the edge area includes at least one second touch area, the second touch area The touch area includes a plurality of key parts; the plurality of key parts include at least one mutual capacitance key part, and the mutual capacitance key part includes a first touch electrode, a second touch electrode and a dummy electrode arranged on the same layer, There is a gap between the first touch electrode and the second touch electrode, and the dummy electrodes are spaced in the gap between the first touch electrode and the second touch electrode.

In an exemplary embodiment of the present disclosure, the gap between the first touch electrode and the second touch electrode extends along a curved or broken line trajectory; the dummy electrode extends along the extending direction of the gap In the extending direction of the gap, the center line of the virtual electrode coincides with the center line of the gap and has the same length.

In an exemplary embodiment of the present disclosure, the distance between the dummy electrodes and the first touch electrodes is 10 μm-30 μm; the distance between the dummy electrodes and the second touch electrodes is 10 μm-30 μm.

In an exemplary embodiment of the present disclosure, a first shielding body is disposed at intervals between two adjacent key portions in the same second touch area.

In an exemplary embodiment of the present disclosure, a second shielding body is disposed between the second touch area and the first touch area.

In an exemplary embodiment of the present disclosure, the edge area further includes a binding area for binding with a driving circuit board; each of the key parts is connected to the binding area through a touch lead; the The second shielding body is provided with a wire-passing slot, the wire-passing slot divides the second shielding body into a plurality of shielding units distributed at intervals, and at least part of the touch leads are connected to the binding area;

The touch panel further includes:

a bridge layer, located on one side of the substrate;

an insulating layer covering the bridging layer;

The touch control layer is disposed on the surface of the insulating layer away from the substrate, and at least two adjacent shielding units are connected through the bridge layer.

In an exemplary embodiment of the present disclosure, the touch leads include:

a first conductive layer, arranged on the same layer as the touch layer;

The second conductive layer is provided on the surface of the first conductive layer away from the substrate, and the boundary of the orthographic projection of the second conductive layer and the first conductive layer on the substrate is coincident; the The second conductive layer is made of metal material.

In an exemplary embodiment of the present disclosure, a plurality of the key parts in the same second touch area further includes a self-capacitance key part, and the self-capacitance key part includes and the first touch electrode and a third touch electrode disposed on the same layer as the second touch electrode.

In an exemplary embodiment of the present disclosure, the touch layer further includes:

A protection line is arranged around the self-capacitance button portion and is used for inputting protection signals.

In an exemplary embodiment of the present disclosure, the ratio of the line width of the protection line to the distance between the protection line and the self-capacitive key portion is not less than 4/3.

According to one aspect of the present disclosure, there is provided a manufacturing method of a touch panel, comprising:

provide a substrate

A touch layer is formed on one side of the substrate, the touch layer has a first touch area and an edge area surrounding the first touch area; the edge area includes at least one second touch area, the The second touch area includes a plurality of key parts; the plurality of key parts include at least one mutual capacitance key part, and the mutual capacitance key part includes a first touch electrode, a second touch electrode and a The dummy electrodes have a gap between the first touch electrodes and the second touch electrodes, and the dummy electrodes are spaced in the gaps between the first touch electrodes and the second touch electrodes.

In an exemplary embodiment of the present disclosure, a first shielding body is disposed at intervals between two adjacent key portions in the same second touch area; the second touch area is connected to the first touch area. A second shielding body is arranged between the control areas.

Before forming the touch layer, the manufacturing method further includes:

forming a bridge layer on one side of the substrate;

forming an insulating layer covering the bridging layer;

In an exemplary embodiment of the present disclosure, the touch leads include:

a first conductive layer, formed at the same time as the touch layer;

According to an aspect of the present disclosure, there is provided a display device, comprising:

a display panel having a display area and a peripheral area surrounding the display area;

The touch panel according to any one of the above, is disposed on one side of the display panel, and the substrate is located on the side of the touch layer away from the display panel; the first touch area is on the side of the display panel; The orthographic projection on the display panel is located in the display area, and the orthographic projection of the edge area on the display panel is located in the peripheral area.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of a touch layer in an embodiment of the disclosed touch panel.

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 .

FIG. 3 is a partial schematic diagram of an embodiment of the disclosed touch panel.

FIG. 4 is a schematic diagram of a mutually capacitive key portion in an embodiment of the disclosed touch panel.

Description of reference numbers:

1, substrate; 2, touch layer; 21, first touch area; 22, edge area; 221, second touch area; 222, binding area; 2211, key part; 2211a, mutual capacitance key part; 2211a1, the first mutual capacitance key part; 2211a2, the second mutual capacitance key part; 2211b, the self capacitance key part; 2212, the first shielding body; 2213, the second shielding body; 250, the shielding unit; 250a, the first shielding unit 250b, the second shielding unit; 250c, the third shielding unit; 2214, the protection line; 210, the first touch electrode; 220, the second touch electrode; 230, the dummy electrode; 240, the third touch electrode; 260 , wire slot; 260a, first wire slot; 260b, second wire slot; 260c, third wire slot; 3, touch wire; 3a, first touch wire; 3b, second touch wire 31, the first conductive layer; 32, the second conductive layer; 4, the bridge layer; 41, the first bridge body; 42, the second bridge body; 5, the first barrier layer; 6, the insulating layer; 7, the second barrier layer; 8, protective layer; 9, first shielded wire; 10, second shielded wire; 11, third shielded wire.

detailed description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/etc; the terms "include" and "have" are used to indicate an open-ended is meant to be inclusive and means that additional elements/components/etc may be present in addition to the listed elements/components/etc; the terms "first", "second" and "third" are used only Tag usage, not a limit on the number of its objects.

Embodiments of the present disclosure provide a touch panel, which can be used in a display device. The display device can include a display panel opposite to the touch panel, and the display panel can be an OLED (Organic Light-Emitting Diode). , organic light-emitting diode) display panel, it can also be a liquid crystal display panel.

As shown in FIGS. 1-4 , the touch panel according to the embodiment of the present disclosure includes a substrate 1 and a touch layer 2, wherein:

The touch layer 2 is disposed on one side of the substrate 1 and has a first touch area 21 and an edge area 22 surrounding the first touch area 21 ; the edge area 22 includes at least one second touch area 221 . The area 221 includes a plurality of key parts 2211; the plurality of key parts 2211 include at least one mutual capacitance key part 2211a, and the mutual capacitance key part 2211a includes the first touch electrodes 210, the second touch electrodes 220 and the dummy electrodes arranged in the same layer 230 , there is a gap between the first touch electrode 210 and the second touch electrode 220 , and the dummy electrodes 230 are disposed in the gap between the first touch electrode 210 and the second touch electrode 220 at intervals.

In the touch panel of the embodiment of the present disclosure, a dummy electrode 230 is disposed between the first touch electrode 210 and the second touch electrode 220 of the mutual capacitance key portion 2211a, and the dummy electrode 230 is connected to the first touch electrode 210 and the second touch electrode 220. The materials of the two touch electrodes 220 are the same; the reflection and refraction effects of light in the area between the first touch electrodes 210 and the second touch electrodes 220 can be close to where the first touch electrodes 210 and the second touch electrodes 220 are located. area, thereby improving the optical uniformity of the mutually capacitive key portion 2211a.

The following is a detailed description of the touch panel according to the embodiment of the present disclosure:

As shown in FIG. 1 , the substrate 1 can be a flat plate structure, and its material is a transparent material. For example, the material of the substrate 1 can be a hard material such as glass, or a flexible material such as polyimide, which is not described here. Special restrictions.

As shown in FIG. 1 and FIG. 2 , the touch layer 2 is provided on one side of the substrate 1 . For example, in order to avoid the influence of impurities in the substrate 1 on the touch layer 2 , the touch layer 2 can be arranged on one side of the substrate 1 . Covering the first barrier layer 5, the material of the first barrier layer 5 may include at least one of silicon oxynitride, silicon oxide and silicon nitride, and of course, may also be other insulating materials. The touch layer 2 can be disposed on the surface of the first barrier layer 5 away from the substrate 1 .

The touch layer 2 can be divided into at least a first touch area 21 and an edge area 22 along its extending direction, and the edge area 22 surrounds the first touch area 21, wherein:

The first touch area 21 may correspond to the display area of the display panel, so that touch operations can be performed on the first touch area 21 according to the picture displayed in the display area. The first touch area 21 may include touch electrodes, and the material of the touch electrodes may be ITO (indium tin oxide) or other transparent conductive materials.

In some embodiments of the present disclosure, the touch electrodes of the first touch area 21 include row touch electrodes and column touch electrodes disposed in the same layer. The row touch electrodes may be distributed along the column direction and extend along the row direction. The touch electrodes can be distributed in the row direction and extend in the column direction; capacitance can be formed between the row touch electrodes and the column touch electrodes, so that the touch position can be determined by sensing the influence of the finger on the capacitance. The principle of mutual capacitive touch It will not be described in detail here. Of course, the touch electrodes of the first touch area 21 may also adopt a self-capacitive touch structure, which will not be described in detail here.

It should be noted that the row direction and the column direction in the present disclosure are used to refer to two mutually perpendicular directions, the row direction is not limited to the horizontal direction, and the column direction is not limited to the vertical direction. Those skilled in the art will know that the actual orientation of the row and column directions may vary due to the rotation of the touch panel.

As shown in FIG. 1 , the edge area 22 may correspond to a peripheral area surrounding the display area in the display panel, and may be used for routing traces connecting the touch electrodes of the first touch area 21 . Further, at least a part of the edge region 22 can implement a touch function. Specifically, the edge area 22 may include at least one second touch area 221 , and the second touch area 221 includes a plurality of key parts 2211 , and each key part 2211 can also be used for touch, so as to replace physical keys.

In some embodiments of the present disclosure, the shape of the first touch area 21 may be a polygon with multiple sides, and the button portions 2211 of the same second touch area 221 are along one side of the first touch area 21 . straight line distribution. For example, the shape of the first touch area 21 is a rectangle with two long sides and two short sides, and the number of the second touch areas 221 is two, which are symmetrically distributed in the first touch area 21 The two sides of the , respectively, are opposite to the two short sides of the first touch area 21 . In addition, the button portions 2211 of the second touch area 221 are distributed at a linear interval along the extending direction of the short side. In different second touch areas 221 , the type (self-capacitance or mutual-capacity) and quantity of the key portions 2211 may be the same or different.

Further, as shown in FIG. 1 and FIG. 3 , the plurality of key parts 2211 include at least one mutual capacitance key part 2211a, and the mutual capacitance key part 2211a may include the first touch electrodes 210 and the second touch electrodes 220 arranged in the same layer. And the dummy electrodes 230, there is a gap between the first touch electrodes 210 and the second touch electrodes 220 to form a capacitance, and the principle of mutual capacitive touch is not described in detail here. The dummy electrodes 230 are disposed in the gaps between the first touch electrodes 210 and the second touch electrodes 220, and are spaced apart from the first touch electrodes 210 and the second touch electrodes 220, namely, the first touch electrodes Neither the 210 nor the second touch electrodes 220 are in contact with the dummy electrodes 230 .

The first touch electrodes 210 , the second touch electrodes 220 and the dummy electrodes 230 can be made of the same transparent conductive material, such as ITO, and can be formed simultaneously through the same patterning process. Moreover, it can also be formed simultaneously with the touch electrodes in the first touch area 21 .

The shapes of the first touch electrodes 210 and the second touch electrodes 220 are not particularly limited here, and the gaps between the first touch electrodes 210 and the second touch electrodes 220 may extend along trajectories such as broken lines and curves. The specific shape depends on the The shapes of the first touch electrodes 210 and the second touch electrodes 220 are determined. The dummy electrodes 230 are strip-shaped structures extending along the extending direction of the gap.

As shown in FIG. 4 , in some embodiments of the present disclosure, the first touch electrodes 210 and the second touch electrodes 220 each include a connection segment and an extension segment, wherein the connection segment extends along a straight line; the number of extension segments is multiple The number of extension segments of the first touch electrodes 210 and the second touch electrodes 220 may be different. At the same time, the extending segments are distributed at intervals along the extending direction of the connecting segment, and extend linearly in a direction away from the connecting segment.

The connection segments of the first touch electrodes 210 and the connection segments of the second touch electrodes 220 are arranged in parallel, and the extension segments of the second touch electrodes 220 are arranged between the extension segments of the first touch electrodes 210 in a one-to-one correspondence. and alternately distributed with the extension segments of the first touch electrodes 210 . At the same time, it is not in contact with the connecting segment and the extending segment of the first touch electrode 210, so that a gap is formed between the first touch electrode 210 and the second touch electrode 220. Correspondingly, the gap can be along a zigzag track. extension, and the width of the gap is not particularly limited here, the width is the distance between the first touch electrodes 210 and the second touch electrodes 220 in the direction perpendicular to the extending track of the gap, for example, the width of the gap Can be 400μm.

In other embodiments of the present disclosure, the first touch electrodes 210 and the second touch electrodes 220 may also have other shapes, so that the gaps between them may also extend along tracks of other shapes such as curves and straight lines.

Further, as shown in FIG. 4 , in the extending direction of the gap between the first touch electrode 210 and the second touch electrode 220 , the centerline of the dummy electrode 230 and the centerline of the gap overlap and have the same length. The center line of the gap passes through the midpoint of the cross section of the gap, and the cross section of the gap is a section perpendicular to its extending direction; the center line of the dummy electrode 230 passes through the midpoint of the cross section of the dummy electrode 230, and the A cross section is a section perpendicular to the direction of its extension. In addition, the distance between the dummy electrodes 230 and the first touch electrodes 210 may be 10 μm-30 μm, for example, 10 μm, 20 μm or 30 μm. The distance between the dummy electrodes 230 and the second touch electrodes 220 is 10 μm-30 μm, for example, 10 μm, 20 μm or 30 μm. Of course, the distance between the dummy electrodes 230 and the first touch electrodes 210 and the distance between the dummy electrodes 230 and the second touch electrodes 220 may be the same or different.

Further, as shown in FIG. 1 and FIG. 3 , the plurality of key parts 2211 in the same second touch area 221 may further include self-capacitance key parts 2211b, and the self-capacitance key parts 2211b may include third touch electrodes 240. The material of the three touch electrodes 240 can be ITO or other transparent conductive materials, and the third touch electrodes 240 are disposed in the same layer as the first touch electrodes 210 and the second touch electrodes 220 . The judgment position can be determined by sensing the capacitance between the third touch electrode 240 and the finger, and the principle of the self-capacitive touch will not be described in detail here.

In an embodiment of the present disclosure, as shown in FIG. 1 and FIG. 3 , there are three key parts 2211 in the second touch area 221 , and includes two mutually capacitive key parts 2211 a and one self-capacitive key part 2211 b, for example Yes, the self-capacitance key part 2211b can be used as a power key, and the two mutual-capacity key parts 2211a can be used as a menu key and a return key respectively. This does not specifically limit the specific uses of the mutually-capacitive key portion 2211a and the self-capacitive key portion 2211b.

In order to avoid signal crosstalk between two adjacent key parts 2211, as shown in FIG. 1 and FIG. 3 , in some embodiments of the present disclosure, a first shielding body 2212 may be arranged between two adjacent key parts 2211, There is a gap between a shielding body 2212 and the adjacent key portion 2211, and the first shielding body 2212 can be grounded. The material of the first shielding body 2212 is ITO or other transparent conductive materials. Further, the first shielding body 2212 can be disposed in the same layer as the first touch electrodes 210 , the second touch electrodes 220 and the dummy electrodes 230 and formed at the same time. The first shielding body 2212 can play the role of signal shielding, so as to prevent signal crosstalk between two adjacent key portions 2211 and ensure the accuracy of touch control. In addition, the first shielding body 2212 can also fill the gaps between the key portions 2211 to improve the optical uniformity of the second touch area 221 .

Further, in order to prevent signal crosstalk between the key portion 2211 and the first touch area 21, as shown in FIG. 1 and FIG. 3, in some embodiments of the present disclosure, the second touch area 221 and the first touch area 221 may be A second shielding body 2213 is disposed between the touch areas 21 , and the second shielding body 2213 can be connected with the first shielding body 2212 . There is a gap between the second shielding body 2213 and each key portion 2211 of the second touch area 221 , and the second shielding body 2213 can be grounded. The material of the second shielding body 2213 is ITO or other transparent conductive materials. Further, the second shielding body 2213 can be in the same layer as the first touch electrodes 210 , the second touch electrodes 220 , the dummy electrodes 230 and the first shielding body 2212 set, and formed at the same time.

If there are water droplets on the self-capacitance button part 2211b, a capacitance will be generated between the self-capacitance button part 2211b and the self-capacitance button part 2211b. After the capacitance sensed by the self-capacitance button part 2211b changes, it can be triggered without being touched by a finger. Therefore, the phenomenon of automatic activation or shutdown may occur. For example, if the self-capacitive button portion 2211b is used as a power button, abnormal phenomena such as automatic startup or shutdown may occur due to water exposure. Therefore, as shown in FIG. 1 and FIG. 3 , in some embodiments of the present disclosure, the touch layer 2 further includes a protection line 2214 , and the protection line 2214 may be disposed around the self-capacitance key portion 2211b and between the self-capacitance key portion 2211b There is a gap, and the shape of the self-capacitance key portion 2211b is an unclosed annular structure, and a protection signal can be input to the protection wire 2214 . The protection line 2214 can be regarded as another self-capacitive touch key that can sense changes in capacitance, and the protection signal is a signal for driving the self-capacitive touch key. Although both water droplets and the human body are conductors, the difference in surface area of the two is large, so the impact on capacitance is quite different; therefore, the protection signal and the signal processing method of the driving circuit board can be reasonably set, and the protection line 2214 can sense the The capacitance change generated by the water droplets, and when sensing the capacitance change generated by the water droplets, the self-capacitance button part 2211b is closed, that is, the input of the driving signal to the self-capacitance button part 2211b is stopped, so as to avoid the self-capacitance button part 2211b caused by water. trigger.

Further, the ratio of the line width of the protection line 2214 to the distance between the protection line 2214 and the self-capacitance key portion 2211b is not less than 4/3; The pitch is 1500 μm.

As shown in FIG. 1 and FIG. 3 , in some embodiments of the present disclosure, the above-mentioned edge area 22 further includes a binding area 222 for binding with the driving circuit board; each key portion 2211 is connected to the Binding area 222. Meanwhile, the protection line 2214 can also be connected to the bonding area 222 through a lead wire, and the bonding area 222 can be used for bonding with the driving circuit board so as to input driving signals and grounding.

As shown in FIG. 1 and FIG. 3 , in order to avoid the touch leads 3 , the second shielding body 2213 is provided with a wire-passing slot 260 , and the wire-passing slot 260 penetrates the second shielding body 2213 in a direction perpendicular to the substrate 1 , so that the The second shielding body 2213 is divided into a plurality of shielding units 250 distributed at intervals, and at least a part of the touch leads 3 of the key portion 2211 are connected to the binding area 222 through the wire-passing slot 260 . Further, only one touch wire 3 passes through the same wire-passing slot 260 .

As shown in FIGS. 1 and 3 , taking a second touch area 221 as an example, in some embodiments of the present disclosure, the first touch area 21 is rectangular in shape and has two long sides and two Short sides. The second touch area 221 is opposite to a short side, and the short side can be named as the target short side. The second touch area 221 has three touch parts 2211, and includes two mutually capacitive key parts 2211a and one self-capacitance key part 2211b linearly distributed along the short side of the target. The two mutually capacitive key parts 2211a include a first The mutual-capacity key portion 2211a1 and the second mutual-capacity key portion 2211a2. The binding area 222 corresponds to a long side of the first touch area 21 , and the second mutual capacitive button portion 2211a2 is located between the first mutual capacitive button portion 2211a1 and the self capacitive button portion 2211b.

The number of the first shielding bodies 2212 is two, one of the first shielding bodies 2212 is located between the first mutual-capacity key portion 2211a1 and the second mutual-capacity key portion 2211a2, and the other first shielding body 2212 is located at the second mutual-capacity key portion between the part 2211a2 and the self-contained key part 2211b. The number of wire-passing slots 260 is three, including a first wire-passing slot 260a, a first wire-passing slot 260b and a first wire-passing slot 260c, so that the second shielding body 2213 is divided into four shielding units 250, four shielding The units 250 are linearly distributed along a direction parallel to the short side of the target, and include a first shielding unit 250 a , a second shielding unit 250 b , a third shielding unit 250 c and a fourth shielding unit 250 d that are sequentially distributed toward the binding area 222 . The first wiring slot 260a is located between the first shielding unit 250a and the second shielding unit 250b, the second wiring slot 260b is located between the second shielding unit 250b and the third shielding unit 250c, and the third wiring slot 260c is located in the Between the third shielding unit 250c and the fourth shielding unit 250d.

Each of the first shielding bodies 2212 has a one-piece structure with a shielding unit 250 corresponding to the gap in which it is located. For example, the first shielding unit 250a corresponds to a part of the first mutual-capacity key portion 2211a1 , and the third shielding unit 250c corresponds to the first shielding unit 250c. Parts of the two mutual-capacity key portions 2211a2 correspond to each other; the second shielding unit 250b has a one-piece structure with the first shielding body 2212 between the first mutual-capacity key portion 2211a1 and the second mutual-capacity key portion 2211a2; the fourth shielding unit 250d and The first shielding body 2212 between the self-capacitive key portion 2211b and the second mutually-capacitive key portion 2211a2 is an integral structure.

Further, the first touch electrodes 210 of the two mutually capacitive button portions 2211a are connected, and the first touch electrodes 210 of one of the mutually capacitive button portions 2211a are connected to the binding via a touch wire 3 passing through the wire slot 260 . Fixed area 222. The second touch electrodes 220 of each mutual capacitance key portion 2211a are connected to the binding area 222 through a touch wire 3 passing through the wire slot 260, and the second touch electrodes 220 of the two mutual capacitance key portions 2211a are The touch leads 3 are different. For example, as shown in FIG. 3 , the touch wire 3 includes a first touch wire 3a and a second touch wire 3b, the number of the first touch wire 3a is one, and the number of the second touch wire 3b is two. The first touch electrodes 210 of the first mutual capacitance key part 2211a1 and the second mutual capacitance key part 2211a2 are connected in series with the same first touch wire 3a, and are connected to the binding area 222 through the first touch wire 3a. The second touch electrodes 220 of the first mutual capacitance key portion 2211a1 can be connected to the binding area 222 through a first touch wire 3a passing through the first wire-passing groove 260a; the second touch electrodes of the second mutual capacitance key portion 2211a2 The control electrode 220 can be connected to the bonding area 222 through another second touch wire 3a passing through the second wire-passing groove 260b.

The first touch electrode 210 of the mutual capacitance key portion 2211a can be used as a transmitting electrode, that is, a driving electrode; the second touch electrode 220 can be used as a receiving electrode, that is, a sensing electrode. During operation, driving signals can be simultaneously input to the first touch electrodes 210 of each mutual capacitance key portion 2211a through the driving circuit board connected to the binding area 222, and the second touch electrodes 220 of each mutual capacitance key portion 2211a can be respectively The sensing signal is fed back to the driving circuit board independently, so as to determine the touch position. The basic principle of the mutual capacitive touch will not be described in detail here.

As shown in FIG. 1 and FIG. 2 , in order to electrically connect different shielding units 250, the touch panel further includes a bridge layer 4 and an insulating layer 6, wherein:

The bridging layer 4 can be disposed on one side of the substrate 1, and it can be metal or other conductive materials.

The insulating layer 6 covers the bridging layer 4, and the insulating layer 6 is made of a transparent insulating material, for example, the material thereof may be photoresist or the like. The touch layer 2 can be disposed on the surface of the insulating layer 6 away from the substrate 1, and at least two adjacent shielding units 250 can be connected to the bridging layer 4 through vias penetrating the insulating layer 6, which can reduce the need for the second shielding body 2213 The number of leads connected to the bond pad 222.

In some embodiments of the present disclosure, as shown in FIG. 2 , the bridging layer 4 may include a plurality of strip-shaped bridging bodies, and the extending direction of the bridging bodies may cross the wire-passing slot 260 so as to connect the wires on both sides of the wire-passing slot 260 . Shield unit 250. For example, as shown in FIG. 3 , the bridge layer 4 includes a first bridge body 41 and a second bridge body 42, wherein: the first bridge body 41 and the second wire-passing slot 260b are located on different layers, and the extending directions intersect, and the second shielding The unit 250b and the third shielding unit 250c are connected to the first bridging body 41 through the via hole, thereby connecting the second shielding unit 250b and the third shielding unit 250c through the first bridging body 41 . Similarly, the third shielding unit 250c and the fourth shielding unit 250d may be connected through the second bridge body 42 .

In some embodiments of the present disclosure, as shown in FIGS. 1 and 3 , in order to strengthen the signal shielding effect and avoid signal interference between the second touch area 221 and the first touch area 21 , the edge area 22 can be set The first shielded wire 9, at least a part of the first shielded wire 9 is located between the second shielding body 2213 and the first touch area 21, and is connected to the binding area 222 and grounded, so as to function as signal isolation. The touch leads 3 connecting each of the first touch electrodes 210 are located on the side of the first shield wire 9 away from the first touch area 21 , and the first shield wire 9 is connected to the first shield unit 250 a , so that the first shield wire 9 can pass through the The first shielding wire 9 grounds the first shielding unit 250a without connecting the first shielding unit 250a and the second shielding unit 250b through the bridging layer 4 to reduce the difficulty of the process; only the second shielding unit 250b and the third shielding unit are connected The unit 250c is connected through the bridge layer 4, and the third shield unit 250c and the fourth shield unit 250d are connected through the bridge layer 4; the third shield unit 250c is connected to the binding area 222 through the second shield wire 10 and grounded, thereby connecting the The second shielding unit 250b, the third shielding unit 250c, and the fourth shielding unit 250d are grounded.

Further, in some embodiments of the present disclosure, as shown in FIG. 1 and FIG. 3 , the second shielding wire 10 is located between the first touch wire 3 a and the second touch electrode 220 connected to the second mutual capacitance key portion 2211 a 2 . Between the second touch leads 3b, it can play the role of preventing signal crosstalk between the first touch leads 3a and the second touch leads 3b on both sides.

Further, in some embodiments of the present disclosure, as shown in FIG. 1 , in order to improve the shielding effect and avoid external interference to the touch panel, a third touch panel surrounding the first touch area 21 can be arranged at the edge of the edge area 22 . The shielded wire 11 and the second touch area 221 are located within the range surrounded by the third shielded wire 11. The third shielded wire 11 can be connected to the binding area 222 and grounded, which can further improve the shielding effect and prevent the touch panel from being caused by the outside world. interference.

In order to improve the performance of the touch leads 3 , as shown in FIGS. 1 and 2 , in some embodiments of the present disclosure, the touch leads 3 may include a first conductive layer 31 and a second conductive layer 32 , wherein:

The first conductive layer 31 and the touch layer 2 can be disposed on the same layer and made of the same material, for example, both of which are made of ITO, so that they can be simultaneously formed through a single patterning process.

The second conductive layer 32 can be disposed on the surface of the first conductive layer 31 away from the substrate 1 , and the boundaries of the orthographic projections of the second conductive layer 32 and the first conductive layer 31 on the substrate 1 are coincident. The material of the second conductive layer 32 is metal, and its conductivity is higher than that of the first conductive layer 31 , so as to improve the conductivity of the touch leads 3 .

Of course, in other embodiments of the present disclosure, the touch leads 3 may also be a single layer with only the first conductive layer 31 or the second conductive layer 32 , or may be a multi-layer structure with more than two layers.

In addition, any one of the first shielded wire 9 , the second shielded wire 10 and the third shielded wire 11 may also be a multi-layer structure, and may also include the same layer and the same material as the first conductive layer 31 and the second conductive layer 32 film layer. Of course, any one of the first shielded wire 9 , the second shielded wire 10 and the third shielded wire 11 may also have a single-layer structure.

As shown in FIGS. 1 and 2 , in some embodiments of the present disclosure, the touch panel may further include a second barrier layer 7 and a protective layer 8 , wherein:

The second barrier layer 7 covers the second conductive layer 32 and the touch layer 2 , and the material of the second barrier layer 7 can be the same as that of the first barrier layer 5 .

The protective layer 8 covers the second barrier layer 7 , and its material can be a transparent insulating material such as photoresist, and its material can be the same as that of the insulating layer 6 .

The present disclosure provides a display device, which may include a display panel and a touch panel, wherein:

The display panel may be an OLED display panel or a liquid crystal display panel, and its specific structure is not particularly limited herein. Meanwhile, the display panel may have a display area and a peripheral area surrounding the display area. The display area is used to emit light to display images, and the peripheral area can be used to set the driving circuit.

The touch panel is located on one side of the display panel, and the substrate is located on the side of the touch layer away from the display panel; the orthographic projection of the first touch area on the display panel is located in the display area, and the orthographic projection of the edge area on the display panel is located in the display panel. peripheral area. The touch panel can be the touch panel of any of the above-mentioned embodiments, and thus its structure and beneficial effects can be referred to the above-mentioned embodiments of the touch panel, which are not repeated here.

Embodiments of the present disclosure further provide a method for manufacturing a touch panel, the touch panel is the touch panel of any of the above embodiments, and its structure is not described in detail here. The manufacturing method may include:

provide a substrate

A touch layer is formed on one side of the substrate, the touch layer has a first touch area and an edge area surrounding the first touch area; the edge area includes at least one second touch area, the The second touch area includes a plurality of key parts 2211; the plurality of key parts 2211 include at least one mutual capacitance key part 2211, and the mutual capacitance key part 2211 includes a first touch electrode and a second touch electrode arranged on the same layer. touch electrodes and dummy electrodes, there is a gap between the first touch electrodes and the second touch electrodes, and the dummy electrodes are spaced between the first touch electrodes and the second touch electrodes within the gap.

The details of the touch panel in the manufacturing method of the embodiment of the present disclosure have been described in the embodiment of the touch panel. For details, reference may be made to the embodiment of the touch panel, which will not be described in detail here.

In some embodiments of the present disclosure, before forming the touch layer, the manufacturing method of the present disclosure may further include:

forming a bridge layer on one side of the substrate;

forming an insulating layer covering the bridging layer;

It should be noted that although the various steps of the manufacturing method of the present disclosure are described in a specific order in the drawings, this does not require or imply that the steps must be performed in this specific order, or that all of the steps shown must be performed. to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be decomposed into multiple steps for execution, and the like.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the appended claims.

Claims

A touch panel, comprising:

substrate;

The touch layer is disposed on one side of the substrate and has a first touch area and an edge area surrounding the first touch area; the edge area includes at least one second touch area, the second touch area The touch area includes a plurality of key parts; the plurality of key parts include at least one mutual capacitance key part, and the mutual capacitance key part includes a first touch electrode, a second touch electrode and a dummy electrode arranged on the same layer, There is a gap between the first touch electrode and the second touch electrode, and the dummy electrodes are spaced in the gap between the first touch electrode and the second touch electrode.
The touch panel according to claim 1, wherein a gap between the first touch electrode and the second touch electrode extends along a curve or a broken line; and the dummy electrode is along an extending direction of the gap The extended strip structure; in the extending direction of the gap, the center line of the virtual electrode coincides with the center line of the gap and has the same length.
The touch panel according to claim 1, wherein the distance between the dummy electrode and the first touch electrode is 10 μm-30 μm; the distance between the dummy electrode and the second touch electrode is 10 μm-30 μm .
The touch panel according to claim 1, wherein a first shielding body is disposed at intervals between two adjacent key portions in the same second touch area.
The touch panel of claim 4 , wherein a second shielding body is provided between the second touch area and the first touch area.
The touch panel according to claim 5, wherein the edge area further comprises a binding area for binding with a driving circuit board; each of the key parts is connected to the binding area through a touch lead; the The second shielding body is provided with a wire-passing slot, and the wire-passing slot divides the second shielding body into a plurality of shielding units distributed at intervals, and at least part of the touch leads are connected to all the touch wires through the wire-passing slot. the binding area;

The touch panel further includes:

a bridge layer, located on one side of the substrate;

an insulating layer covering the bridging layer;

The touch control layer is disposed on the surface of the insulating layer away from the substrate, and at least two adjacent shielding units are connected through the bridge layer.
The touch panel according to claim 6, wherein the touch leads comprise:

a first conductive layer, arranged on the same layer as the touch layer;

The second conductive layer is provided on the surface of the first conductive layer away from the substrate, and the boundary of the orthographic projection of the second conductive layer and the first conductive layer on the substrate is coincident; the The second conductive layer is made of metal.
The touch panel according to claim 1, wherein the plurality of key parts in the same second touch area further comprises a self-capacity key part, and the self-capacitance key part comprises a The electrodes and the second touch electrodes are arranged in the same layer as the third touch electrodes.
The touch panel according to claim 8, wherein the touch layer further comprises:

A protection line is arranged around the self-capacitance button portion and is used for inputting protection signals.
The touch panel according to claim 9, wherein a ratio of the line width of the protection line to the distance between the protection line and the self-capacitive key portion is not less than 4/3.
A method for manufacturing a touch panel, comprising:

provide a substrate

A touch layer is formed on one side of the substrate, the touch layer has a first touch area and an edge area surrounding the first touch area; the edge area includes at least one second touch area, the The second touch area includes a plurality of key parts; the plurality of key parts include at least one mutual capacitance key part, and the mutual capacitance key part includes a first touch electrode, a second touch electrode and a The dummy electrodes have a gap between the first touch electrodes and the second touch electrodes, and the dummy electrodes are spaced in the gaps between the first touch electrodes and the second touch electrodes.
The manufacturing method according to claim 11 , wherein a first shielding body is spaced apart between two adjacent key portions in the same second touch area; the second touch area is connected to the first touch area. A second shielding body is arranged between the control areas.
The manufacturing method according to claim 12, wherein the edge area further comprises a binding area for binding with a driving circuit board; each of the key parts is connected to the binding area through a touch wire; the The second shielding body is provided with a wire-passing slot, the wire-passing slot divides the second shielding body into a plurality of shielding units distributed at intervals, and at least part of the touch leads are connected to the binding area;

Before forming the touch layer, the manufacturing method further includes:

forming a bridge layer on one side of the substrate;

forming an insulating layer covering the bridging layer;

The touch layer is disposed on the surface of the insulating layer away from the substrate, and at least two adjacent shielding units are connected through the bridge layer.
The manufacturing method according to claim 13, wherein the touch leads comprise:

a first conductive layer, formed at the same time as the touch layer;

The second conductive layer is provided on the surface of the first conductive layer away from the substrate, and the boundary of the orthographic projection of the second conductive layer and the first conductive layer on the substrate is coincident.
A display device, comprising:

a display panel having a display area and a peripheral area surrounding the display area;

The touch panel according to any one of claims 1 to 10, which is disposed on one side of the display panel, and the substrate is located on a side of the touch layer away from the display panel; the first touch The orthographic projection of the area on the display panel is located in the display area, and the orthographic projection of the edge area on the display panel is located in the peripheral area.